Table construction for paper drills



July 15, 1941. H. c. NYGREN TABLE CONSTRUCTION FOR PAPER DRILLS FiledJan. 23, 1939 2 She''ts-Sheefl l V July l5, 1941.

H. c. NYGREN TABLE CONSTRUCTION FOR PAPER DRILLS Filed Jan. 23, 1939 2Sheets-Sheet 2 l. n. u IHMHT" It I 7 u 2. 2 i 7 u 5 m L T: IQ f? L all nJ 3. 3 2w Z n W i i I Patented July 15, 1941 TABLE CONSTRUCTION FORPAPER. DRILLS Henry C. Nygren, Chicago, Ill., assignor to Nygren-DahlyCompany, Chicago, 111., a corporation of Illinois Application January23, 1939, Serial No. 252,329

6 Claims. (01. 77 ss) My invention relates to a table for paper drills.and is particularly adapted for single spindle paper drills whereinpaper is drilled'for looseleaf filing or binding purposes, and isadapted to provide means whereby holes through the paper can beaccurately positioned and spaced with respect to each other without thenecessity of moving and repositioning the paper, as is common withdrills of this type used heretofore.

Another and further object of myinvention is the provision of a tablewhich is moved quickly and easily to any predetermined position by theoperator merely unlatching a release means, thereby securing accuracyand proper spacing of the holes drilled through the paper.

Another and further object of my invention is the provision of a tablehaving means thereon so that the operator by merely unlatching thefastening means of the table allows the table to move to a predeterminedposition, and when 'released from this point automatically moves on toanother predetermined position, the table being previously adjusted withrespect to the spindle on the drill so that the holes are accuratelydrilled through the paper for filing or binding purposes.

Another and further object of my'invention is the provision of -a tablehaving a plurality of stops thereon which may be adjustably' placed "atvarious positions to provide for the proper'positioning of thepaper-under the drills without the necessity of moving the paper or ofholding the table while the drilling operation is being performed, thismovement of the table being semiautomatic in character and controlled by'a latch within easy reach of the operatorwherebyth'e table is moved tothe various positions needed for the operation and without anyparticular attention'on the part of the operator after the 1 stops onthe table-have beenproperly set andthe paper-placed in the properposition onthe table.

In drilling operations forpaper for binding and filing purposes it is:necessarythat the holes therefor be drilled with absolute accuracy? orelse there is a large amountof spoilage resulting from the drillingoperation. Usually "paper in quantities of at least a ream is-drilled,and it has been common practice heretofore to place the paper on thetable, mark the paper toythe proper position for drilling, andthereafter shift the paper under the drill where the holes 'are desired.Very frequently the paper is moved or 1 the measurements are not placedaccurately-,or

the paper is not jogged-evenly, with the result that the holes aredrilled through thepaper in the wrong positions and a large quantity ofpaper is ruined and must be recut or thrown away due to this improperpositioning of the holes therein.

With my improved device, if care is exercised in the settingof themachine, the holes will be accurately spaced with respect toeach other,as Well as accurately positioned in the paper itself, and the paper isnot moved after it is placed in position on the. table, in whichpositionit is held by guidinglm eansjcommon'to devices of this sort.

Another object ofmy' invention is. the provision of a shifting tablewhich is easy to'install, inexpensive to manufacture, and accurate andsimplein its operation.

Theseand other objects of my invention will be more fully andbetter-understood by reference to the accompanying sheet of drawings,and in V which I Figure 1 is a perspective view of a drilling ma-'chine'with table applied thereto;

"Figure. 2 is a top plan view of the machine and table. shown in Figure1;-

Figure 3 is a front elevational view of the table;

{the spring. tension means for moving the table; I

and v j .7 Figure the: mounting of the'table on the stand, and also thelatch means for. holding thetable in fixed position. 7 V a Referring nowspecifically to the drawings, and in which like reference charactersrefer vto like parts throughout, a stand I0.is shown havingthe usualreciprocating drill head I I mounted thereon to which an electric motorI2 is attached, the rear end of the drill head ll 7 being slidablymounted in the frame l0. A foot treadle I3 is provided by meansof'whi'ch the drill head and motor are reciprocat'ed in averticaldirection to bring-the drill bit 'into contact with the paper. Extendingforward from the frame Ill-is a projecting portion l4 having'aflattoppe'd projecting portion I5 upon which a plate I6 is mounted infixed relation with'th'e frame-in any approved manner. A framejll isprovided which has a plurality of'rollers I8, 18' mounted therein at thefrontand rear sidesof the table and contact the :upper side 'ofthe platelB :alongits marginal edges; whichforms a track upon 'whichlthe rollers7 is aidetailed sectional view showing 7 run as the reciprocating tablemoves back and forth.

Strips l9, l9 are provided which extend longitudinally of the frame I1and pass beneath the plate I6 along its inner and outer marginal edgesfor the purpose of holding the frame H in proper position with respectto the plate I6 and prevent displacement of the table in a verticaldirection. Mounted upon the frame I1 is a table top 28 with angles 2|extending around the marginal edge of the table top 2|] to provide afinished appearance and give strength for the working operations to beconducted upon the table. Mounted upon the ends 22, 22 of the angles 2|at the rear of the table is a rod 23 upon which a plurality of movablestops 24, 24 are positioned. These stops are clamped to the rod by meansof a threaded member 25, with the stops having a slit 26a therein sothatthey are sufficiently elastic on one side to be clamped around therod 23 in various adjusted positions. The stops 24 at their sides: nearthe table are beveled as at 24a, to allow the stops 24 to freely passthe latch hereinafter described when the table is moved from left toright position.

Secured to the projecting portion l4 of the frame I9 is a bracket 26having a latch 21 slidably mounted therein. A pin 28 is provided overwhich. one end of a spring 29 is fitted, the opposite end of the springbeing secured to a post 30 extending downward from the bracket 26. Thelatch 21 has a recess 3| in the upper side thereof within which arocking bar 32 is fitted, the bar being pivotally secured at each of itsends to the projecting rear corner portions of the frame l1 by means ofpins 33 at the upper side of and in each end of the bar 32. A lever 34is provided having its inner end secured to the lower edge of the bar 32by a pin 35, and its outer end secured to a fingerpiece 36 having ahandle portion 31. The fingerpiece 36 is pivotally mounted on one of theangles 2| by means of a rivet 38, and provides means by which theoperator can rock the bar 32, thereby withdrawing the latch member clearof the stops 24, 24 carried by the rod 23 on the table 28.

A drum 39 is provided mounted upon an axle 40 carried by brackets 4|, 4|secured to the under side of the plate l6 in any approved manner. Thedrum has a spring 42 coiled therein, one end of which is anchored to astud 43 carried by the axle 48 and the other end anchored to a pin 44extending through the drum 39. A tape or strap 45 is wound around theouter periphery of the drum and has its end secured thereto in anyapproved manner, with its free end secured to the underside of the frameH by a bolt 46 or any other approved clamping means.

On the outer end of the axle 40 is a thumb nut 41 having a recessextending longitudinally thereof within which a spring 48 is positioned,with a cap 49 being provided to hold the spring in proper positionaround the axle 40. The

thumb nut 41 has a keyway therein with a hold the axle 40 againstrotation, thereby hold- 7 ing the spring 42 in proper tension to movethe table upon its being released by the operator by rocking the bar 32.

A stop 54 is provided having an upturned end 55 against which a stop 56abuts and which prevents the table20 from overrunning the plate |6 in aright to left direction. The table 28 is prevented from overrunning theplate I1 in a left to right direction by the bracket 26 engaging theangle 2| at the left side of the table 20. Secured to the outer side ofthe member I1 is a bracket 51 having a locking bolt 58 mounted therein,on the outer end of which a thumb nut 59 is mounted. The bracket 51 hasa recess therein within which a spring 60 is positioned around thelocking bolt 58, with a pin 6| extending through the locking bolt 58 andprojecting laterally therefrom on each side adapted to be moved inrecesses 62 on each side of the bracket 51. The inner end of the lockingbolt 58 extends into a hole 63 formed in a bracket 64 mounted on theunder side of the plate |6, this combination providing means by whichthe table may be locked in a central position with respect to the drillhead II for performing fixed operations in paper laid upon the table 20.

A guide bar 65 extends longitudinally of the table and has guide blocks66, 66 adjustably positioned thereon by means of screws 61, 61, theguide bar at each of its ends being clamped by bolts 68, 68 having thumbnuts 69, 69 thereon. A marginal edge of one of the angles 2| iscalipered to assist the operator in the proper adjustment of theabutting stops 66, 66 with relation to the edge of the paper. The'table28 has a groove 18 therein within which a bolt 1| is mounted having athumb nut 12 thereon by means of which a stop 13 is positioned at thetop of the table and against which the ends of the paper is abuttedduring the drilling operation.

In the operation of the devicewhen it is desired to drill spaced holesin a plurality of sheets of paper, such as a ream or the like, the paperis placed flatwise on the table 20 and in side to side relation-with theedge guide blocks 66, 66 and in relation with the end stop 13. The stops24 are then set at the proper position with respect to the location atwhich it is desired to drill the holes in the paper. The calipered rearedge of the table provides means for locating the stops at the properplace on the rod 23. If three holes are to be drilled only three stopsare needed. After proper adjustment the table is pushed to the left sideas far as it will go, the angulanend of' the latch 21 allowing thestops, because of their angular position, to pass freely past thelatchin a left to right direction of the table. Thereafter the operatorreleases the latch by squeezing upward on the fingerpie'ce 31, and uponreleasing it the table travels to the proper position for a hole to bedrilled. The operator thereupon presses downward upon the treadle l3with his foot, bringing the drill downward into 'contact with the paperand drilling a hole therethrough. The release is operated. again by theoperator for the second hole, and the table travels to theproper.position. The treadle is again pressed downward and the operationrepeated. This can be done, of'course, as many times as may be necessaryto drill holes in the paper, and once the table is set in properadjustment it is not necessary to move it for that operation, theoperator simply being careful that the paper is placed in properposition against the marginal and end stops on the table. In thismanner, repeated operations of the device can be carried on with theassurance that holes drilled through the paper will be in absoluteregister and in this manner wastage or spoilage of paper is avoided.

While I have described more or less precisely the details ofconstruction, I do not Wish to be understood as limiting myself thereto,as I contemplate changes in form and the proportion of parts and thesubstitution of equivalents as circumstances may suggest or renderexpedient without departing from the spirit or scope of my invention.

I claim:

1. In combination with a paper drilling mechanism of a movable table,spring mechanism for moving the table in one direction, movable stopscarried by the said table, a rod carried by said table, a plurality ofmovable stops thereon, a latch carried by the said frame, a rocking barin engagement with the said latch, and manual operable means to actuatethe rocking bar whereby the said latch is released from said movablestops.

2. In combination with a paper drilling mecha anismF of a movable table,spring mechanism for moving the table in one direction, movable stopscarried by the said table, a rod carried by said table, a plurality ofmovable stops thereon, a latch bar having a recess in one end thereof, arocking bar carried by said table and mounted in the recess in the saidlatch bar, an operating rod connected to said rocking bar, and anoperating handle mounted on the table adjacent the front edge thereofconnected to the said operating rod.

3. In combination with a paper drilling mechanism of a movable table,spring mechanism for moving the table in one direction, movable stopscarried by the said table, a rod carried by said table, a plurality ofmovable stops thereon, a latch bar having a recess in one end thereof, arocking bar carried by said table and mounted in the recess in the saidlatch bar, an operating rod connected to said rocking bar, and anoperating handle mounted on the under side of said table at one sidethereof and extending to the front edge thereof connected to the saidoperating rod.

4. In combination with a paper drilling mechanism having a frame mountedthereon, a table movably mounted on the said frame, a rod at the rear ofsaid table, a plurality of stops movably mounted in the said rod andadapted to be clamped thereto in a plurality of positions, a springnormally under tension, flexible means connecting said spring and thetable, a latch slidably mounted on the said frame, a rocking bar carriedby the movable table, and manually operable means on the said tablewhereby the rocking bar may be actuated thereby releasing the said latchfrom engagement with any one of the said. stops.

5. In combination with a paper drilling mechanism having a frame mountedthereon, a table movably mounted on the said frame, a rod at the rear ofsaid table, a plurality of stops movably mounted in the said rod andadapted to be clamped thereto in a plurality of positions, a springnormally under tension, flexible means connecting said spring and thetable, a latch slidably mounted on the said frame, a rocking bar carriedby the movable table, andmanually operable means on the said tablewhereby the rocking bar may be actuated thereby releasing the said latchfrom engagement with any one of the said stops, the table being normallymovable in one direction and held against move gularly shaped at one oftheir ends movably V mounted in the said rod and adapted to' be clampedthereto in a plurality of positions, a spring normally under tension,flexible means connecting said spring and the table, a latch slidablymounted on the said frame, a rocking bar carried by the movable table,and manually operable means on the said table whereby therocking bar maybe actuated thereby releasing the said latch from engagement With anyone of the said stops. 7

' HENRY C. NYGREN.

